Could i be pregnant

I need help I started my period on the 18th of this month i started spotting for the first 2 days then light bleeding for the next 2. My period lasted about 4 days. It’s usually 6 to 7 days. My period ended on the 21st and now I’m spotting only when I whip so my question is could I be pregnant we have been ttc our rainbow baby for 8 months help please